Microbiology A person working in an abattoir presented with a papule on hand, which turned in to an ulcer. Which will best help in diagnosis A Polychrome Methylene blue B Carbol Fuschin C Acid Fast Stain D Calcoflour White 💡 Explanation A person working in an abattoir presented with a papule on hand, which turned in to an ulcer. Which will best help in diagnosis ✓ Correct Answer: A. Polychrome Methylene blue